[stanlalee]

Da hell is this! I didn't use to mind since my AFR were always ok but as I'm toying more with my tune its getting annoying now. My trims use to be perfect then all of a sudden this:
http://datazap.me/u/stanlalee/e35-si...0&data=3-12-13

How is it magically fine (adaptation multiplication=LTFT) after 4500rpm (I realize max boost/tq is in the range of trouble but the discrepency makes no sense)

My fuel trims with the same scalar settings, same e30ish fuel, RICHER AFR with only 1 psi peak boost difference (in the problem area) use to be perfect:
http://datazap.me/u/stanlalee/stage1...0&data=3-11-12

This happened like overnight months ago and changing the scalar, tune, resetting adaptations (via BT tool if it even does it, can't tell), NOTHING fixes it. The top log also has low pressure fuel sensor and HPFP rail pressure logged but since I don't know what range is weak or ok it means nothing to me. Can somebody at least rule in/out my LPFP as the culprit. Thanks. Mods are tune (tweaked OFT/shiv with 3d scalar), intercooler, drop in filter and e30-35ish fuel.

[SteveAZ]

Your LPFP is starting out at 5K hectopascals (72psi) and dropping to 3.5K~4K hectopascals (50-58psi) in the upper RPM range. So not too bad.

Your HPFP is dropping to about 120K hectopascals (1740psi) so again, not too bad.

As for your "LTFT's" at tip in, I don't see anything alarming.

What are your concerns?

[stanlalee]

Originally Posted by SteveAZ

As for your "LTFT's" at tip in, I don't see anything alarming.

What are your concerns?

Well my main concern is

a) it didn't use to happen so I figure something must be wrong lol. Those 90+% readings use to be single digits using the same logging technique (see before log above)

b) not sure what you mean by "tip in". That whole log is WOT (I delete/edit out the tip in for logging purposes run probably started at 2600rpm) and the 90+% goes clear into the 4000+rpm range before going normal.

I am glad to hear my pump is not terribly bad at 83k miles. That is good news indeed!

[SteveAZ]

I see what you're saying...I missed that in the first log and referenced the second log after evaluating your fuel pumps.

I'm not sure what's going on with your LTFT's in the first log....haven't ever seen anything like that.

By tip-in I mean the first second or so after you go WOT when things are chaotic and trying to stabilize...trims, AFR's, fuel pressures.....